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Joins are for lazy people?
I recently had a discussion with another developer who claimed to me that JOINs (SQL) are useless. This is technically true but he added that using joins is less efficient than making several requests and link tables in the code (C# or Java).
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Android: How can I get the current foreground activity (from a service)?
Is there a native android way to get a reference to the currently running Activity from a service?
12 Answers
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In Jinja2, how do you test if a variable is undefined?
Converting from Django, I'm used to doing something like this:
6 Answers
6
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How do I update each dependency in package.json to the latest version?
... now want to bump all of the dependencies to their latest versions since this is a fresh project and I don't mind fixing something if it breaks.
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What does !! mean in ruby?
Just wondering what !! is in Ruby.
8 Answers
8
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Creating a “logical exclusive or” operator in Java
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Java does have a logical XOR operator, it is ^ (as in a ^ b).
Apart from that, you can't define new operators in Java.
Edit: Here's an example:
public static void main(String[] args) {
boolean[] all = { false, true };
for (boolean a : all) {
for (...
How to check if an array value exists?
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Using if?
if(isset($something['say']) && $something['say'] == 'bla') {
// do something
}
Btw, you are assigning an value with the key say twice, hence your array will result in an array with only one value.
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Loader lock error
...u need to go to menu Debug -> Exceptions, open the Managed Debugging Assistants, find LoaderLock and uncheck
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How can I strip all punctuation from a string in JavaScript using regex?
... do something like
replace(/\s{2,}/g," ");
My full example:
var s = "This., -/ is #! an $ % ^ & * example ;: {} of a = -_ string with `~)() punctuation";
var punctuationless = s.replace(/[.,\/#!$%\^&\*;:{}=\-_`~()]/g,"");
var finalString = punctuationless.replace(/\s{2,}/g," ");
Result...
“using namespace” in c++ headers
... using namespace std; right after the #include s in their .h files. This seems to me to be dangerous since then by including that header in another program I will get the namespace imported into my program, maybe without realizing, intending or wanting it (header inclusion can be very deeply ne...